Plant Parasites of Europe

leafminers, galls and fungi

Erysiphe palczewskii

Erysiphe palczewskii (Jaczewski) Braun & Takamatsu, 2000

on Caragana, Colutea, Robinia

Erysiphe palczewskii on Caragana arborescens

Caragana arborescens, Hungary, Budapest, 3.viii.2020 © László Érsek: leaf with beginning infection

Erysiphe palczewskii on Caragana arborescens

underside

Erysiphe palczewskii on Caragana arborescens

seriously infected leaf

Erysiphe palczewskii on Caragana arborescens

underside

Erysiphe palczewskii on Caragana arborescens

cleistothecia exceedingly numerous

Erysiphe palczewskii: cleistothecia

leaf transverse section, with immature and mature cleistothecia

Erysiphe palczewskii: cleistothecia

the appendages of the cleistothecia are strongly branched distally.

gall

mycelium amphigenous. Appressoria lobed, mostly single. Conidia solitary, elliptic, without fibrosin bodies. Cleistothecia with 3-13 asci, that contain 4-7 spores. Appendages 3-20, equatorial or a bit higher, 1-2.5 x the diameter; they have 0-1 sept, are rather stiff, almost hyaline, at the tip 5-8 times dichotomously branched in quick succession.

According to Klenke & Scholler the cleistothecia are very numerous, standing in dense groups.

host plants

Fabaceae, oligophagous

Caragana arborescens, aurantiaca, boisii, decorticans, densa, franchetiana, frutex, ? microphylla, sophorifolia, spinosa; Colutea arborescens; Robinia hispida, pseudoacacia.

synonyms

Microsphaera palczewskii Jaczeswki, 1927.

references

Bacigálová & Marková (2006a), Beenken & Senn-Irlet (2016a), Braun (1995a, 2000a), Braun & Cook (2012a), Bresinsky (2016a), Czerniawska (2001a), Dynowska, Fiedorowicz & Kubiak (1999a), Jage, Klenke, Kruse ao (2016a), Jage, Klenke & Kummer (2010a), Klenke & Scholler (2015a), Kozłowska, Mułenko & Heluta (2015a), Korytnianska & Popova (2012a), Kruse (2014a, 2019a), Lebeda, Mieslerová & Sedlářová (2005a), Mułenko, Piątek, Wołczańska ao (2010a), Negrean & Anastasiu (2006a), Ruszkiewicz-Michalska (2006a), Ruszkiewicz-Michalska & Michalski (2005a), Scheuer & Bechter (2012a), Sucharzewska, Dynowska, Kubiak ao (2012b), Talgø, Sundheim, Gjærum ao (2010a).

Last modified 17.viii.2020